Materials Literature
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We apply epsilon-machine spectral reconstruction theory to analyze structure and disorder in four previously published zinc sulfide diffraction spectra and contrast the results with the most common alternative theory, the fault model. In each case we find that the reconstructed epsilon-machine provides a more comprehe…
The interaction between composite colloidal particles composed of a spherical core and grafted AB-diblock polyampholytes (diblock copolymers with oppositely charged blocks) are investigated by using a coarse-grained model solved with Monte Carlo simulations. The B block is end-grafted onto the core of the colloid and…
A description of the tilt of octahedra in ABX(3) perovskite-related structures is proposed that can be used to extract the unique values for the tilt parameters varphi, theta and delta of ABX(3) structures with regular and distorted octahedra up to the point symmetry \bar 1, from atomic coordinates and lattice paramet…
The feasibility of synthesizing metal–oxide–metal (MOM) heterojunction nanowires in the Au–TiO 2 –Au system is demonstrated. The synthesis method presented here entails sequential electroplating of Au and electro-deposition of amorphous titanium oxide (TiO x ) inside nanoholes of anodic aluminium oxide (AAO) templates…
In experiments conducted at the Bio-CARS beamline 14-BM-C (APS, Argonne National Laboratory, USA), Streptomyces rubiginosus D-xylose isomerase (EC 5.3.1.5) crystals were used to test the effect of cryogen temperature on radiation damage. Crystals cooled using a helium cryostat at an 8 K set temperature consistently sh…
Arsenates with arsenic in octahedral coordination are very rare. The present paper provides an overview of all known M(+) arsenates(V) containing octahedrally coordinated arsenic (M(+) = Li, Na, K, Rb, Cs, Ag) and the crystal structures (determined from single-crystal X-ray diffraction data) of the following seven new…
Abstract A simple method to fabricate polymer nanocomposites with single‐walled carbon nanotubes is reported, in which the nanotubes were reacted with poly( L ‐lysine) by using high‐speed vibration milling. The nanocomposites obtained were characterized by Fourier transform infrared (FT‐IR), UV–Vis spectroscopy, and t…
Metallic ruthenium capping layers ~2 nm thick protect and extend the lifetimes of Mo/Si multilayer mirrors used in extreme ultraviolet lithography (EUVL) applications. However, Ru-capped mirrors experience a loss of reflectivity after prolonged exposure to EUV radiation. In the present work, we use ultrahigh vacuum su…
Abstract Network‐like nanostructures made from the nonlinear optical material beta barium metaborate (β‐BaB 2 O 4 , β‐BBO) have been successfully synthesized from a BBO gel precursor by a sol–gel method. The homogeneous BBO gel precursor is prepared by the hydrolysis and condensation of barium acetate, sorbitol, and b…
Simulations are used to address the effects of oscillating shear strain on jammed systems composed of spherical particles. The simulations show that shear oscillations with amplitudes of more than a few percent lead to substantial crystallization of the system. To ensure that the conclusions are independent of the sim…
The effect of temperature and time of heating of zinc oxide and boric acid in aqueous medium on product type, dehydration behavior, crystal morphology, and structure was investigated for the production of flame retardant and smoke suppressant zinc borate. Two different products dehydrated at 140 and 350 °C were obtain…
WO 3 –SiO 2 compound thin films were deposited on glass substrates using the sol–gel method, and then all the samples were dried at 100 °C and annealed at 400 °C in air. The effect of WO 3 concentration on the hydrophilicity of WO 3 –SiO 2 compound films was studied for the first time and it was shown that the films c…
Ethanol (C(2)H(5)OH) adsorption, decomposition and oxidation is studied on Ir(111) using high-energy resolution, fast XPS and temperature-programmed desorption. During heating of an adsorbed ethanol layer a part of the C(2)H(5)OH(ad) desorbs molecularly, and another part remains on the surface and decomposes around 20…
Abstract We have successfully coated CNTs with either positively or negatively charged polyelectrolytes employing Van der Waals interactions between nanotubes and polyelectrolyte molecules, without any previous chemical modification of the nanotubes walls. Polymer adsorption of polyelectrolytes was performed in an eth…
As analogues of the well-known conducting polymer polyaniline, aniline oligomers have been extensively investigated because of their well-defined structure, good solubility, and electroactivity. In this study, we demonstrated for the first time the successful and high-yield synthesis of a novel electroactive organo-br…
A series of WO3/SBA-15 materials with different Si/W ratios have been prepared by impregnating the host material SBA-15 with aqueous ammonium paratungstate solutions. After temperature-programmed carburization (TPC) in flowing CH4/H2 (20/80 v/v mixture), the materials are converted to the corresponding W2C/SBA-15 spec…
Vertically aligned zinc oxide nanorod arrays were grown directly using a zinc foil as both source and substrate in pure water at low temperature by a simple hydrothermal reaction. The morphology and crystal structure of the ZnO nanorod arrays were examined by scanning electron microscopy, transmission electron microsc…
From strength to strength: Two strengthening mechanisms, grain-size refinement of a metal matrix and reinforcement with homogeneously dispersed CNTs, are combined to fabricate strong CNT/Co nanocomposites (see image). The CNT/Co nanocomposites with an ultrafine-grained Co matrix and homogeneously dispersed CNTs show s…
A technique is described whereby the addition of low concentrations (millimolar to micromolar) of the fluorescent dye 1,8-ANS to the protein solution prior to crystallization results in crystallization experiments in which protein crystals are strongly contrasted above background artifacts when exposed to low-intensit…
Stringent North American emission regulations present several challenges for lean-burn diesel vehicles that offer significant fuel economy advantages over gasoline vehicles. This article presents a useful systems approach to developing robust models and combining them to analyze diesel aftertreatment (AT) technologies…